US Patent Class 258
RAILWAY MAIL DELIVERY-- Main Headings
 Electronic File Wrappers |  Electronic Patent Documents |  Paper Patent Documents | Current as of: June, 1999
|  and Services |
| Electronic File Wrappers | Electronic Patent Documents | Paper Patent Documents | Current as of: June, 1999
| and Services |
| CLASS NOTES | ||
| 1 | DF | MISCELLANEOUS |
| 1.2 | DF | AIRCRAFT IN FLIGHT {3} |
| 2 | DF | SIGNALING FEATURE |
| 3 | DF | HAND TOOLS |
| 4 | DF | MAGNETIC |
| 5 | DF | PROJECTORS {1} |
| 8 | DF | CAR-POSITIONED RECEIVER OR SUPPORT |
| 9 | DF | LATERALLY SLIDING RECEIVER OR SUPPORT |
| 10 | DF | LONGITUDINALLY EXTENDING AUXILIARY TRACK |
| 11 | DF | COMBINED RECEIVER AND SUPPORT {3} |
| 20 | DF | RECEIVERS {1} |
| 23 | DF | SUPPORTS {3} |